Fulham have completed a club-record £34.6m deal to sign Shakhtar Donetsk winger Kevin.
The Brazilian, 22, has penned a five-year contract with the Cottagers, who have the option to extend it by a further year.
“I am happy to be in the biggest league in the world, at a huge club, too,” said Kevin.
“I’m very flattered for everything that’s happening in my life, and I hope to score a lot of goals this season and do great work here in Fulham.”
Kevin scored 17 goals in 57 matches in all competitions for the Ukrainian side and is the second wide player to head to Craven Cottage on deadline day after Samuel Chukwueze.
The 26-year-old and Swedish forward Jonah Kusi-Asare, 18, both arrived on season-long loans with an option to make the moves permanent.
The Cottagers had also agreed a £22m move for Chelsea forward Tyrique George until it collapsed in the final hours of deadline day.